6. Utada Hikaru – Sanctuary

As I am completely obsessed with the "Kingdom Hearts" video game franchise, I am going to cheat by sneaking this song onto the list. Penned and performed by Japanese music icon Utada Hikaru, "Sanctuary" is my absolute favorite theme song. Take it a step further by listening to the Japanese version of this track and you will see why Utada Hikaru deserves her status as a successful singer.